Where in the world?
The flag of Niger has three horizontal stripes of orange, white, and green with an orange circle in the center.

Niger

Population: 24,206,636

Region: Africa

Subregion: Western Africa

Capital: Niamey

Top Level Domain: .ne

Currencies: West African CFA franc

Border countries

The flag of Algeria has two vertical bands of green and white, with a red crescent and star centered over the boundary between the colors.

Algeria

Population: 44,700,000

Region: Africa

Capital: Algiers
The flag of Benin has two horizontal bands of yellow and red with a green vertical band on the hoist side.

Benin

Population: 12,123,198

Region: Africa

Capital: Porto-Novo
The flag of Burkina Faso has two horizontal stripes of red and green with a yellow five-pointed star in the center.

Burkina Faso

Population: 20,903,278

Region: Africa

Capital: Ouagadougou
The flag of Chad has three vertical stripes of blue, yellow, and red.

Chad

Population: 16,425,859

Region: Africa

Capital: N'Djamena
The flag of Libya has a horizontal triband of red, black, and green with a white crescent and star centered on the black stripe.

Libya

Population: 6,871,287

Region: Africa

Capital: Tripoli
The flag of Mali has three vertical stripes of green, yellow, and red.

Mali

Population: 20,250,834

Region: Africa

Capital: Bamako
The flag of Nigeria has three vertical stripes of green, white, and green.

Nigeria

Population: 206,139,587

Region: Africa

Capital: Abuja